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The Megamaser Cosmology Project: IV. A Direct Measurement of the Hubble Constant from UGC 3789
M. J. Reid, J. A. Braatz, J. J. Condon +4
In Papers I and II from the Megamaser Cosmology Project (MCP), we reported initial observations of water masers in an accretion disk of a supermassive black hole at the center of t…
The Megamaser Cosmology Project. V. An Angular Diameter Distance to NGC 6264 at 140 Mpc
Chengyu Kuo, James A. Braatz, Mark J. Reid +4
We present the direct measurement of the Hubble constant, yielding the direct measurement of the angular-diameter distance to NGC 6264 using the HO megamaser technique. Our m…
The size, luminosity and motion of the extreme carbon star IRC+10216 (CW Leonis)
K. M. Menten, M. J. Reid, T. Kaminski +1
Very Large Array observations of the extreme carbon star IRC+10216 at 7 mm wavelength with 40 milli-arcsecond resolution resolve the object's radio emission, which forms an almost…
Cosmology and the Hubble Constant: On the Megamaser Cosmology Project (MCP)
C. Henkel, J. A. Braatz, M. J. Reid +4
The Hubble constant Ho describes not only the expansion of local space at redshift z ~ 0, but is also a fundamental parameter determining the evolution of the universe. Recent meas…